Kusnadi, A., and I. Putra. “Rancang Bangun Sistem Pakar Prediksi Stres Belajar Dengan Neural Network Algoritma Backpropagation”. Ultimatics : Jurnal Teknik Informatika, Vol. 7, no. 2, Aug. 2016, pp. 105-12, doi:https://doi.org/10.31937/ti.v7i2.361.